Hefeextrakt-Agar (YEA)
According to DIN EN ISO 6222:1999
| Shorthand symbol: | YEA |
| Item number: | 72-1290 |
| Format: | 500ml-bottle with 400ml nutrient medium |
| Colour: | Clear, yellowish coloured |
| Storage conditions: | Dry, in closed bag, at 15-22°C |
| Shelf-life: | 3 Months |
| pH: | 7.2 ± 0.2 bei 25°C |
Yeast Extract Agar Medium is for the detection, isolation and enumeration of bacteria cultivated at 22 ± 1 °C and 37 ± 1 °C in water and waste water samples (BS EN ISO 6222:1999).
| in g per 1 litre nutrient medium | |
|---|---|
| Casein Peptone | 6.0 |
| Yeast Extract | 3.0 |
| Agar | 10.0 |
The Microbiological Performance Test is carried out in accordance with the requirements BS EN ISO 11133:2014.
Productivity
Incubation conditions: 44 ± 4 Hours at 36 ± 1°C; Inoculation concentration of target organisms:80–120 CFU
| Organism | Type Strain | Specification | Colony morphology | |
|---|---|---|---|---|
| Escherichia coli | ATCC 8739 / WDCM 00012 | ≥ 70 % | - | |
| Bacillus subtilis | ATCC 6633 / WDCM 00003 | ≥ 70 % | - |
Microbial Contamination
Incubation conditions: 5–7 days at 20–25°C and 5–7 days at 30–35°C
| Specification |
|---|
| No microbial contamination |